Polkadot Nudibranch
Phyllidia polkadotsa
- Usual depth5–20 m
- Water temperature20–29 °C
- Best monthsApril, May, and July
- How commonRare
Photo credit: (c) Thomas Irvine, some rights reserved (CC BY) · CC BY · iNaturalist
About this species
Phyllidia polkadotsa is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.
Text from the Wikipedia article “Phyllidia polkadotsa”, licensed CC BY-SA 4.0. Read the article
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 8 records
- February: 16 records
- March: 10 records
- April: 29 records
- May: 31 records
- June: 17 records
- July: 24 records
- August: 18 records
- September: 21 records
- October: 6 records
- November: 11 records
- December: 9 records
Depth and water temperature
Depth
Mostly recorded at 5–20 m · Deepest record: 30 m
Water temperature
Recorded in surface water of 20–29 °C
Photos
(c) Dan Schofield, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist 
(c) Robin White, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Dan Schofield, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist 
(c) Thomas Irvine, some rights reserved (CC BY) · CC BY · iNaturalist
Names and classification
- English
- Polkadot Nudibranch, Polka-dotted Nudibranch
Names in 2 more languages
- Japanese
- ポルカドットイボウミウシ
- Simplified Chinese
- 波點葉海蛞蝓
Similar species
Heavenly Wart SlugPhyllidia coelestis
Elegant PhyllidiaPhyllidia elegans
Ocellated Wart SlugPhyllidia ocellata
Black-rayed phyllidiaPhyllidia picta
Variable Wart SlugPhyllidia varicosa
- Baba's Phyllidia
Phyllidia babai
Sources and credits
Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).
- Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
- Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
- Conservation status as published by GBIF (IUCN Red List).
- 62 open-data records from 1980 to 2026.
- Species data updated October 26, 2026.
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